diff --git a/challenges/basic-bonfires.json b/challenges/basic-bonfires.json
index 51bb15e0e2..7296435fa3 100644
--- a/challenges/basic-bonfires.json
+++ b/challenges/basic-bonfires.json
@@ -1074,9 +1074,12 @@
       ],
       "tests": [
         "assert.deepEqual(unite([1, 3, 2], [5, 2, 1, 4], [2, 1]), [1, 3, 2, 5, 4], 'should return the union of the given arrays');",
-        "assert.deepEqual(unite([1, 3, 2], [1, [5]], [2, [4]]), [1, 3, 2, [5], [4]], 'should not flatten nested arrays');"
+        "assert.deepEqual(unite([1, 3, 2], [1, [5]], [2, [4]]), [1, 3, 2, [5], [4]], 'should not flatten nested arrays');",
+        "assert.deepEqual(unite([1, 2, 3], [5, 2, 1]), [1, 2, 3, 5], 'should correctly handle exactly two arguments');",
+        "assert.deepEqual(unite([1, 2, 3], [5, 2, 1, 4], [2, 1], [6, 7, 8]), [ 1, 2, 3, 5, 4, 6, 7, 8 ], 'should correctly handle higher numbers of arguments');"
       ],
       "MDNlinks": [
+        "Arguments object",
         "Array.reduce()"
       ],
       "challengeType": 5,